Abstract:

Department of Mechanical Engineering
Virginia Polytechnic Institute and State University

Abstract

An unsteady, finite-rate, one-dimensional model has been developed for
the analysis for gas-turbine combustors. The basis of the model is the
one-dimensional, integral form of the conservation equations for
multi-species, non-equilibrium, reacting mixtures. Special procedures
were devised for the flow-division of the inlet flow into primary- and
annular-flows, for both straight- and reverse-flow combustors. This
allows the model to handle complete combustor configurations, which at
present are beyond the reach of more sophisticated CFD tools.
The model was validated with a steady-state analytical solution
for a basic problem, and with steady-state results from a production
code applied to a production combustor. Additional calculations show
the ability of the code to predict blow-out due to rich and lean
mixtures, and to predict the response of a combustor to perturbations
in operating and boundary conditions.

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